Portion of an electronic mouse



FIG. 1 is a front perspective view of a portion of an electronic mouseshowing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof; and,

FIG. 4 is a right side view thereof.

The unshown bottom forms no part of the claimed design. The broken lineshowing of various regions and the unshaded areas there within form nopart of the claimed design.

The ornamental design for a portion of an electronic mouse, as shown anddescribed.